The Microduino (TM) OLED display (blue-green)is a tiny 128 x 64 pixel display desined for use with the Microduino range of Core and Core+ boards. It is based upon the common SSD1306 driver IC and uses an I2C interface for communication. This means that only 2 wires are required to control this display (excluding power and GND).

Specification:

Resolution 128x64
Interface: I2C
Power: 3.3V

Schematic:

Datasheet:

SSD1306 controller datasheet:

SSD1306.pdf

Microduino/Arduino Library:

There are several libraries available for this module. For the example sketch below we have used the MicroLCD library developed by Stanley Huang.

I've added the datasheet for the SSD1302 controller to the first post. Your second and third questions are good ones. The module is intended to directly interface with both 3.3 and 5V versions of the Core and Core+ boards. From our own checks of the design, there are two 270 ohm resistors placed in series with the IO pins. These are shifting a 5V TTL level from a core board down to 3.5V. This is around 0.2V above VDD and so their values have been clearly chosen as the simplest way of level shifting from 5V.

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